package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.CategoryDTO;
import com.sky.dto.CategoryPageQueryDTO;
import com.sky.entity.Category;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.CategoryMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.CategoryService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.util.List;

/**
 * 分类管理业务实现
 *
 * @Author itcast
 * @Create 2023/4/22
 **/
@Service
@Slf4j
public class CategoryServiceImpl implements CategoryService {

    @Autowired
    private CategoryMapper categoryMapper;
    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private SetmealMapper setmealMapper;

    /**
     * 新增分类
     *
     * @param categoryDTO
     */
    public void save(CategoryDTO categoryDTO) {
        Category category = new Category();
        //对象属性拷贝
        BeanUtils.copyProperties(categoryDTO, category);

        category.setStatus(StatusConstant.DISABLE);
//        category.setCreateTime(LocalDateTime.now());
//        category.setUpdateTime(LocalDateTime.now());
//        category.setCreateUser(BaseContext.getCurrentId());
//        category.setUpdateUser(BaseContext.getCurrentId());

        //调用mapper，插入数据
        categoryMapper.insert(category);
    }

    /**
     * 分页查询
     *
     * @param categoryPageQueryDTO
     * @return
     */
    public PageResult pageQuery(CategoryPageQueryDTO categoryPageQueryDTO) {
        PageHelper.startPage(categoryPageQueryDTO.getPage(), categoryPageQueryDTO.getPageSize());

        Page<Category> page = categoryMapper.pageQuery(categoryPageQueryDTO);
        long total = page.getTotal();
        List<Category> result = page.getResult();
        return new PageResult(total, result);
    }

    /**
     * 根据id删除分类
     *
     * @param id
     */
    public void deleteById(Long id) {
        //根据分类id查询菜品
        Integer count = dishMapper.countByCategoryId(id);
        if (count > 0) {
            //判断当前分类是否关联了菜品，如果关联了则不能删除，抛出业务异常
            throw new DeletionNotAllowedException(MessageConstant.CATEGORY_BE_RELATED_BY_DISH);
        }
        // 判断当前分类是否关联了套餐，如果关联了则不能删除，抛出业务异常
        //查看当前分类关联的菜品后否在套餐表中
        Integer countDishId = setmealMapper.countByCategoryId(id);
        if (countDishId > 0) {
            throw new DeletionNotAllowedException(MessageConstant.CATEGORY_BE_RELATED_BY_SETMEAL);

        }


        categoryMapper.deleteById(id);
    }

    /**
     * 根据id修改分类
     *
     * @param categoryDTO
     */
    public void update(CategoryDTO categoryDTO) {
        Category category = new Category();
        BeanUtils.copyProperties(categoryDTO, category);

//        category.setUpdateUser(BaseContext.getCurrentId());
//        category.setUpdateTime(LocalDateTime.now());

        categoryMapper.update(category);
    }

    /**
     * 启用禁用
     *
     * @param status
     * @param id
     */
    public void startOrStop(Integer status, Long id) {
        Category category = Category.builder()
                .id(id)
                .status(status)
//                .updateUser(BaseContext.getCurrentId())
//                .updateTime(LocalDateTime.now())
                .build();
        categoryMapper.update(category);
    }

    /**
     * 根据类型查询分类
     *
     * @param category
     * @return
     */
    public List<Category> list(Category category) {
        return categoryMapper.list(category);
    }
}
